反应详情

温度

-78 °C

To a solution of trimethyl(prop-1-ynyl)silane (259 mg, 2.31 mmol) in THF (7.5 mL) at −78° C. was added n-BuLi 2.5M in hexane (1.1 mL, 2.8 mmol). After 90 min at −78° C. 2-(chloromethyl)-8-methyl-imidazo[1,2-a]pyridine (500 mg, 2.8 mmol) in THF (5 mL) was added dropwise. The solution became blue-green at −78° C. The solution was stirred at −78° C. for an additional 1 h. The reaction was quenched with water and the solvent was removed under reduced pressure. The crude product was purified over silicagel chromatography (prepacked 25 g silicagel column, DCM/MeOH from 100/0 to 99/1 as eluent) to afford 590 mg of 8-methyl-2-(4-(trimethylsilyl)but-3-ynyl)-imidazo[1,2-a]pyridine (Yield: 100%) as an yellow oil.

1. custombecame blue-green at −78° C
2. customThe reaction was quenched with water
3. customthe solvent was removed under reduced pressure
4. customThe crude product was purified over silicagel chromatography (prepacked 25 g silicagel column, DCM/MeOH from 100/0 to 99/1 as eluent)